9984.T SoftBank Group JPX 29 Jan 2026: Active at JPY 4201.00, OpenAI watch

The 9984.T stock closed on JPX at JPY 4201.00 on 29 Jan 2026, up 3.70% and trading 86,639,900.00 shares, ranking it among Japan’s most active stocks today. Volume surged above the 79,229,486.00 average, driven by reports SoftBank is in talks to invest up to $30.00 billion more in OpenAI. This mix of deal headlines and heavyweight holdings pushed investors to reprice SoftBank Group Corp. (9984.T) across value and growth angles.